roswe orswe rsowe srowe osrwe sorwe rowse orwse rwose wrose owrse worse rswoe srwoe rwsoe wrsoe swroe wsroe oswre sowre owsre wosre swore wsore rosew orsew rsoew sroew osrew sorew roesw oresw reosw erosw oersw eorsw rseow sreow resow ersow serow esrow oserw soerw oesrw eosrw seorw esorw rowes orwes rwoes wroes owres wores roews orews reows erows oerws eorws rweos wreos rewos erwos weros ewros owers woers oewrs eowrs weors ewors rsweo srweo rwseo wrseo swreo wsreo rsewo srewo reswo erswo serwo esrwo rweso wreso rewso erwso werso ewrso swero wsero sewro eswro wesro ewsro oswer sower owser woser swoer wsoer osewr soewr oeswr eoswr seowr esowr owesr woesr oewsr eowsr weosr ewosr sweor wseor sewor eswor wesor ewsor
Note: these 'words' (valid or invalid) are all the permutations of the word roswe. These words are obtained by scrambling the letters in roswe.